If this is a chronic problem for you and you are using a regular browser, there is a simple solution.
Paste in your text, then highlight it all (as though you are going to copy it), then click on the icon in the top left of the reply editor that looks like this: A/A
That should remove most of the extra microsoft added coding.
You might have to go through your post and add back any formatting you need using the same set of tools at the top of the editor afterwards.
1964 Airstream Overlander | 1964 Globetrotter | Blog
You have brains in your head. You have feet in your shoes. You can steer yourself any direction you choose. | Dr. Seuss